Creating a revolute / sliding joint

[Anonymous]

Hi all,

Hope someone can help me ? I looked though the tutorials and forums, but I'm still struggling.

I have a part that relies on a "cam" action to move a body upwards and then tilt it. the problem is, I can't get the joints sorted to first allow for the upwards movement and then the rotating movement. Also, I tried movement link but to no avail. Also, I it doesn't work to have two different joints on the same two parts.

I already got the revolute joint working ,but obviously its not moving up and down anymore.

I am sure its just a concept that I am not getting right , or so, but please if anyone can assist, this would help me to further the design as well.

Thanks.

D

[ritste20]

Have you tried changing the revolute joint to a pin-slot configuration? Revolute will fix the rotation axes of the two components so it is limited to 1 degree of freedom.

P.S. I did try it with your model. The contact solver must it a little rough to manipulate but it does work as intended. Maybe try reducing the contact set from all to just the pins and plate on one side of the model.

Regards,

[davebYYPCU]

You need a third invisible component, 

Frame slider with invisible, and bucket Revolve with invisible.

Hope that makes some sense, can tackle an example later.

Might help....

[jhackney1972]

I created a Screencast to illustrate what @davebYYPCU was describing.  This will take care of the vertical and rotational joint but you will have a very hard time finding some way to retain the other pin in the curved slot.  Contact Sets in Fusion 360 are very unpredictable and interfere easily with other joints.  Pin and Slot joint is not possible because Fusion 360 does not allow for a pin and slot joint to follow a curve, at least not yet.  They have promised it will come but when is another story.  Model is attached.

[davebYYPCU]

Yep, from there it is a one step, two step.

slider has rest at the top, 

rotate the bucket until the pin enters the track, rest position for the bucket.

Drag / drive joint with only one joint at a time.

Red pin, great!

Might help.....

[ritste20]

You don't need the pin to follow the curved slot. Use it on the pin that travels vertically in the long slot and the contact set handles the curved section when the second pin can make the swing into its final position.

Unless I'm misunderstanding the intended motion of the system...

Regards,